B13017, Proposed Tech Specs Clarifying Intent of Tech Spec 4.4.5.1.4.a.8 Re Extent & Origination Point of Steam Generator Tube Exams

Proposed Tech Specs Clarifying Intent of Tech Spec 4.4.5.1.4.a.8 Re Extent & Origination Point of Steam Generator Tube Exams

ML20154F932
Person / Time
Site:	Millstone
Issue date:	09/13/1988
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20154F924	List: B13017, Proposed Tech Specs Clarifying Intent of Tech Spec 4.4.5.1.4.a.8 Re Extent & Origination Point of Steam Generator Tube Exams ML20154F920
References
B13017, TAC-69401, TAC-69557, NUDOCS 8809200181
Download: ML20154F932 (2)

Text

'

~~

I, ,

... .~ *

>. ~

1 l

Docket No. 50-336-B13017 4

i l

Millstona Nuclear Power Station, Unit No. 2 Attachment 1 Proposed Revision to Technical Specifications l

t i

f i

l

?$f2)QyM1O800913 .

P September 1988 k34.

h i

i

+- -~w~n,-w-n-,-r,--- -

REACTOR COOLANT SYSTEM SURVEILLANCE REQUIREMENT (Continued) 4.4.5.1.4 Acceotance Criteria

a. As used in this Specification

1. Imperfection means an exception to the dimensions, finish or contour of a tube or sleeve from that required by fabrication drawings or specifications. Eddy-current testing indications below 20% of the nominal tube or sleeve wall thickness, if detectable, may be considered as imperfections.

2.

Dearadation means a service-induced cracking,

wastage, wear or general corrosion occurring on either inside or outside of a tube or sleeve.

3. Dearaded Tube or sleeve means a tube or sleeve containing imperfections 2 20% of the nominal wall thickness caused by degradation.

4.  % Dearadation means the percentage of the tube wall or sleeve thickness affected or removed by degradation.

5. Defect means an imperfection of such severity that it exceeds

• te plugging limit. A tube containing a defect is defective.

6. Pluacina limit means the im)erfection depth at or beyond which the tube shall be repaired aecause it may become unserviceable prior to the next inspection and is equal to 40% of the nominal wall thickness for tubes or sleeves.

7. Unserviceable describes the condition of a tube if it leaks or contains a defect large enough to affect its structural integrity in the event of an Operating Basis Earthquake, a loss-of-coolant 2:ccident, or a steam line or feedwater line break as specified in 4.4.5.1.3.c, above.

8. Tube Insoection means an inspection of the steam generator tube from the point of entry (hot leg side) completely around the U bend to the top support of the cold leg or an inspection from the point of entry (hot leg or cold leg side) completely around the U bend to the opposite tube end.

b. The steam generator shall be determined OPERABLE after completing the corresponding actions (plug or sleeve all tubes exceeding the plugging limit and plug c11 defecting sleeves) required by Table 4.4 6.

MILLSTONE - UNIT 2 3/4 4-7a Amendment No. 22,37,52,EE,121